A professional who tends machine that expands pipe ends to specified diameter by one of following methods. Respnsibilities include:

• (1) Starts machine that rotates pipe against die to expand end of pipe.
• (2) Places pipe in expanding machine and starts machine that forces mandrels into end to expand pipe to specified diameter.
• (3) Starts machine that inserts and expands cylindrical element within pipe to enlarge pipe to specified diameter.
• Pushes pipe along conveyor rolls to expander block.
• Verifies dimensions of pipe end with ring or plug gauge.
• Important variables may be indicated by trade names of machine used.